A sterile, flexible tube intended to be used for the percutaneous transluminal passage and placement of a diagnostic/interventional catheter or lead (e.g., pacing lead, balloon dilatation catheter) through its lumen, within the vascular system. It may be rigid or flexible, non-steerable or steerable, and the distal section of the tube can have a variety of preformed shapes (e.g., straight, hockey stick). It is not intended for infusion, and is not a microcatheter (i.e., not intended to access superselective small vessels). It may include a disposable percutaneous introduction set. This is a single-use device.